#include<stdio.h>#include<string.h>#include<math.h>#include<ctype.h>#include<algorithm>using namespace std;typedef long long lld;lld a,b;int main(){    while(scanf("%lld",&a)!=EOF)    {        scanf("%lld",&b);        if(a==0&&b==0)            break;        int cnt=0;        int tot=0;        while(a!=0||b!=0)        {            if(a%10+b%10+cnt>=10)            {                cnt=1;                tot++;            }            else            {                cnt=0;            }            a/=10;            b/=10;        }        if(tot==0)printf("No ");        else printf("%d ",tot);        if(tot<=1)            printf("carry operation.\n");        else            printf("carry operations.\n");    }    return 0;}